Modem-Related Symptoms
Symptom/Error |
| FRU/Action | in | Sequence |
|
Internal | modem does | Ÿ Go | to | “Modem Board Check” | |
not work | correctly | on | page 117. | ||
ŸModem connector
ŸModem board
ŸSystem board
Intermittent Problems
Intermittent system hang problems can be caused b variety of reasons that have nothing to do with a defect, such as cosmic radiation, electronic disc software errors. FRU replacement should only be c ered when a recurring problem exists.
When analyzing the intermittent problem, do the foll
1. | Run | the | diagnostic test for | the system board |
| 10 times. |
| ||
2. | If | no | error is detected, | do not replace an |
3.If any error is detected, replace the FRU test to verify that there are no more errors
Undetermined Problems
The diagnostic tests did not identify which adapt device failed, which installed devices are incorre a short circuit is suspected, or whether the sy erative. Follow the procedures below to isolate th FRU.
Verify that the power supply being used at the failure is operating correctly.
1.Power off the computer.
2.Check the cables, wires, and connectors for s cuits and open circuits. Visually check them f
damage. If any problems are found, replace t
3. Remove or disconnect all of the following devic
Ÿ
ŸPrinter, external mouse & keyboard, and oth external devices
ŸBattery pack
ŸHard disk drive
Ÿ Diskette
Ÿ PC Card (PCMCIA)
4.Power on the computer.
5. Determine if the problem has changed.
6.If the problem does not occur again, reconnec removed devices one at a time until you find failing FRU.
ThinkPad i Series 1400 (Part131 II)
